FAST CRACK GROWTH ALONG INTERFACES

Authors

  • A. NEEDLEMAN
  • D. COKER
  • A.J. ROSAKIS

Abstract

ANALYSES OF DYNAMIC CRACK GROWTH ALONG INTERFACES ARE DISCUSSED. THE MATERIAL ON EACH SIDE OF THE BOND LINE IS CHARACTERIZED BY AN ELASTIC CONSTITUTIVE RELATION. A COHESIVE SURFACE CONSTITUTIVE RELATION THAT ALLOWS FOR THE CREATION OF NEW FREE SURFACE IS ALSO SPECIFIED ACROSS HE BOND LINE. THE RESISTANCE TO CRACK INITIATION AND THE CRACK SPEED HISTORY ARE THEN PREDICTED WITHOUT INVOKING ANY ADDITIONAL FAILURE CRITERION. TWO DIMENSIONAL MODELS, BOTH PLANE STRAIN AND PLANE STRESS, OF THE CON¯GURATION USED IN EXPERIMENTS OF ROSAKIS AND CO-WORKERS RE ANALYZED. THE FOCUS IS ON THE EMERGENCE OF CRACK SPEEDS GREATER THAN A CHARACTERISTIC WAVE SPEED AND ON THE NATURE OF CRACK TIP ¯ELDS AT SUCH INTERSONIC CRACK SPEEDS.

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Published

2005-03-01

Issue

Vol. 2 No. 1 (2005)

Section

Articles

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